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Hello I'm New And I Need Some Desperate Help! 1989 Gmc

bradyjames

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bradyjames Enthusiast

bradyjames

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My 89 GMC Sierra c2500 won't start. I was driving home from school the other day and it started stumbling and running rough. When I came up to the light, it seemed like it was running smooth and when the light turned green, I started to accelerate and the truck stalled on me. It took me several starts to get it fired back up and I was able to drive it a couple blocks from my house before it stalled on me again. This time I couldn't get it started and I had to get help to push it across the intersection. I sat for a minute, got it started and drove it home at about 10 mph. Any faster and the truck would start to hesitate and stumble. I was able to coast the truck into my driveway and before I could even put the truck in park and turn the engine off, the engine stalled on me again. Now I can't even get the truck to start and idle. It turns over just fine and I have just purchased a brand new battery. I have also just replaced the fuel filter and the coolant temperature sensor. The only way I can get the truck to start is if I pour some gas directly into the carburetor. The engine will fire and run until it burns up the gas. Any ideas or suggestions on where to begin would be greatly appreciated. Thanks for your help!! BTW, I purchased this truck from my neighbor who was the original owner and took excellent care of the truck. That is the reason I purchased it from him as I know he has never had any problems with it. It has sat for about 6 months because he purchased a brand new 2010 GMC Sierra 2500 quad cab truck. How did I suddenly inherit all the problems? I've seen him drive the truck for 20 years with not one problem .

Zembonez Senior Enthusiast

Zembonez

Posted
Posted

Certainly sounds like a fuel deliver issue but on a 21 year old truck it;s really hard to know where to start.

bradyjames Enthusiast

bradyjames

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  • Author
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Welcome to the site! How old is the fuel filter?

The fuel filter is 1 day old. I just replaced it yesterday. And thank you!

 

Brady

bradyjames Enthusiast

bradyjames

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Certainly sounds like a fuel deliver issue but on a 21 year old truck it;s really hard to know where to start.

Thank you! I will look into that.

 

Brady

bigredmariner Senior Enthusiast

bigredmariner

Posted
Posted

It does sound like a fuel pump issue, especially since you replaced the filter already and it still won't run on its own. See if you can get the fuel pressure checked to at least verify whether it's the pump or not. Good luck, sure hope you get it going again.

bradyjames Enthusiast

bradyjames

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Well everyone, I took my truck into the shop this morning and sure enough I have a bad fuel pump and they also said I have a bad harness? Could anyone please tell me what the harness is or what exactly it does and how it affects me? Thanks for your help everyone!

bigredmariner Senior Enthusiast

bigredmariner

Posted
Posted

Are they talking about the fuel pump harness, if so that's not that hard to believe since the wires are soaking up all that gas over the years. They do tend to get very brittle. At least you are on the road to getting it fixed.

bradyjames Enthusiast

bradyjames

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  • Author
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GOOD NEWS EVERYONE, JUST GOT MY TRUCK BACK YESTERDAY AFTERNOON AND IT RUNS LIKE A DREAM!!! THANK YOU ALL FOR YOUR HELP AND ADVICE. GREATLY APPRECIATED!

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